1 /******************************************************************************
2 *
3 * Module Name: exconvrt - Object conversion routines
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2024, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include <contrib/dev/acpica/include/acpi.h>
153 #include <contrib/dev/acpica/include/accommon.h>
154 #include <contrib/dev/acpica/include/acinterp.h>
155 #include <contrib/dev/acpica/include/amlcode.h>
156
157
158 #define _COMPONENT ACPI_EXECUTER
159 ACPI_MODULE_NAME ("exconvrt")
160
161 /* Local prototypes */
162
163 static UINT32
164 AcpiExConvertToAscii (
165 UINT64 Integer,
166 UINT16 Base,
167 UINT8 *String,
168 UINT8 MaxLength,
169 BOOLEAN LeadingZeros);
170
171
172 /*******************************************************************************
173 *
174 * FUNCTION: AcpiExConvertToInteger
175 *
176 * PARAMETERS: ObjDesc - Object to be converted. Must be an
177 * Integer, Buffer, or String
178 * ResultDesc - Where the new Integer object is returned
179 * ImplicitConversion - Used for string conversion
180 *
181 * RETURN: Status
182 *
183 * DESCRIPTION: Convert an ACPI Object to an integer.
184 *
185 ******************************************************************************/
186
187 ACPI_STATUS
AcpiExConvertToInteger(ACPI_OPERAND_OBJECT * ObjDesc,ACPI_OPERAND_OBJECT ** ResultDesc,UINT32 ImplicitConversion)188 AcpiExConvertToInteger (
189 ACPI_OPERAND_OBJECT *ObjDesc,
190 ACPI_OPERAND_OBJECT **ResultDesc,
191 UINT32 ImplicitConversion)
192 {
193 ACPI_OPERAND_OBJECT *ReturnDesc;
194 UINT8 *Pointer;
195 UINT64 Result;
196 UINT32 i;
197 UINT32 Count;
198
199
200 ACPI_FUNCTION_TRACE_PTR (ExConvertToInteger, ObjDesc);
201
202
203 switch (ObjDesc->Common.Type)
204 {
205 case ACPI_TYPE_INTEGER:
206
207 /* No conversion necessary */
208
209 *ResultDesc = ObjDesc;
210 return_ACPI_STATUS (AE_OK);
211
212 case ACPI_TYPE_BUFFER:
213 case ACPI_TYPE_STRING:
214
215 /* Note: Takes advantage of common buffer/string fields */
216
217 Pointer = ObjDesc->Buffer.Pointer;
218 Count = ObjDesc->Buffer.Length;
219 break;
220
221 default:
222
223 return_ACPI_STATUS (AE_TYPE);
224 }
225
226 /*
227 * Convert the buffer/string to an integer. Note that both buffers and
228 * strings are treated as raw data - we don't convert ascii to hex for
229 * strings.
230 *
231 * There are two terminating conditions for the loop:
232 * 1) The size of an integer has been reached, or
233 * 2) The end of the buffer or string has been reached
234 */
235 Result = 0;
236
237 /* String conversion is different than Buffer conversion */
238
239 switch (ObjDesc->Common.Type)
240 {
241 case ACPI_TYPE_STRING:
242 /*
243 * Convert string to an integer - for most cases, the string must be
244 * hexadecimal as per the ACPI specification. The only exception (as
245 * of ACPI 3.0) is that the ToInteger() operator allows both decimal
246 * and hexadecimal strings (hex prefixed with "0x").
247 *
248 * Explicit conversion is used only by ToInteger.
249 * All other string-to-integer conversions are implicit conversions.
250 */
251 if (ImplicitConversion)
252 {
253 Result = AcpiUtImplicitStrtoul64 (ACPI_CAST_PTR (char, Pointer));
254 }
255 else
256 {
257 Result = AcpiUtExplicitStrtoul64 (ACPI_CAST_PTR (char, Pointer));
258 }
259 break;
260
261 case ACPI_TYPE_BUFFER:
262
263 /* Check for zero-length buffer */
264
265 if (!Count)
266 {
267 return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
268 }
269
270 /* Transfer no more than an integer's worth of data */
271
272 if (Count > AcpiGbl_IntegerByteWidth)
273 {
274 Count = AcpiGbl_IntegerByteWidth;
275 }
276
277 /*
278 * Convert buffer to an integer - we simply grab enough raw data
279 * from the buffer to fill an integer
280 */
281 for (i = 0; i < Count; i++)
282 {
283 /*
284 * Get next byte and shift it into the Result.
285 * Little endian is used, meaning that the first byte of the buffer
286 * is the LSB of the integer
287 */
288 Result |= (((UINT64) Pointer[i]) << (i * 8));
289 }
290 break;
291
292 default:
293
294 /* No other types can get here */
295
296 break;
297 }
298
299 /* Create a new integer */
300
301 ReturnDesc = AcpiUtCreateIntegerObject (Result);
302 if (!ReturnDesc)
303 {
304 return_ACPI_STATUS (AE_NO_MEMORY);
305 }
306
307 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
308 ACPI_FORMAT_UINT64 (Result)));
309
310 /* Save the Result */
311
312 (void) AcpiExTruncateFor32bitTable (ReturnDesc);
313 *ResultDesc = ReturnDesc;
314 return_ACPI_STATUS (AE_OK);
315 }
316
317
318 /*******************************************************************************
319 *
320 * FUNCTION: AcpiExConvertToBuffer
321 *
322 * PARAMETERS: ObjDesc - Object to be converted. Must be an
323 * Integer, Buffer, or String
324 * ResultDesc - Where the new buffer object is returned
325 *
326 * RETURN: Status
327 *
328 * DESCRIPTION: Convert an ACPI Object to a Buffer
329 *
330 ******************************************************************************/
331
332 ACPI_STATUS
AcpiExConvertToBuffer(ACPI_OPERAND_OBJECT * ObjDesc,ACPI_OPERAND_OBJECT ** ResultDesc)333 AcpiExConvertToBuffer (
334 ACPI_OPERAND_OBJECT *ObjDesc,
335 ACPI_OPERAND_OBJECT **ResultDesc)
336 {
337 ACPI_OPERAND_OBJECT *ReturnDesc;
338 UINT8 *NewBuf;
339
340
341 ACPI_FUNCTION_TRACE_PTR (ExConvertToBuffer, ObjDesc);
342
343
344 switch (ObjDesc->Common.Type)
345 {
346 case ACPI_TYPE_BUFFER:
347
348 /* No conversion necessary */
349
350 *ResultDesc = ObjDesc;
351 return_ACPI_STATUS (AE_OK);
352
353
354 case ACPI_TYPE_INTEGER:
355 /*
356 * Create a new Buffer object.
357 * Need enough space for one integer
358 */
359 ReturnDesc = AcpiUtCreateBufferObject (AcpiGbl_IntegerByteWidth);
360 if (!ReturnDesc)
361 {
362 return_ACPI_STATUS (AE_NO_MEMORY);
363 }
364
365 /* Copy the integer to the buffer, LSB first */
366
367 NewBuf = ReturnDesc->Buffer.Pointer;
368 memcpy (NewBuf, &ObjDesc->Integer.Value, AcpiGbl_IntegerByteWidth);
369 break;
370
371 case ACPI_TYPE_STRING:
372 /*
373 * Create a new Buffer object
374 * Size will be the string length
375 *
376 * NOTE: Add one to the string length to include the null terminator.
377 * The ACPI spec is unclear on this subject, but there is existing
378 * ASL/AML code that depends on the null being transferred to the new
379 * buffer.
380 */
381 ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE)
382 ObjDesc->String.Length + 1);
383 if (!ReturnDesc)
384 {
385 return_ACPI_STATUS (AE_NO_MEMORY);
386 }
387
388 /* Copy the string to the buffer */
389
390 NewBuf = ReturnDesc->Buffer.Pointer;
391 strncpy ((char *) NewBuf, (char *) ObjDesc->String.Pointer,
392 ObjDesc->String.Length);
393 break;
394
395 default:
396
397 return_ACPI_STATUS (AE_TYPE);
398 }
399
400 /* Mark buffer initialized */
401
402 ReturnDesc->Common.Flags |= AOPOBJ_DATA_VALID;
403 *ResultDesc = ReturnDesc;
404 return_ACPI_STATUS (AE_OK);
405 }
406
407
408 /*******************************************************************************
409 *
410 * FUNCTION: AcpiExConvertToAscii
411 *
412 * PARAMETERS: Integer - Value to be converted
413 * Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX
414 * String - Where the string is returned
415 * DataWidth - Size of data item to be converted, in bytes
416 * LeadingZeros - Allow leading zeros
417 *
418 * RETURN: Actual string length
419 *
420 * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string
421 *
422 ******************************************************************************/
423
424 static UINT32
AcpiExConvertToAscii(UINT64 Integer,UINT16 Base,UINT8 * String,UINT8 DataWidth,BOOLEAN LeadingZeros)425 AcpiExConvertToAscii (
426 UINT64 Integer,
427 UINT16 Base,
428 UINT8 *String,
429 UINT8 DataWidth,
430 BOOLEAN LeadingZeros)
431 {
432 UINT64 Digit;
433 UINT32 i;
434 UINT32 j;
435 UINT32 k = 0;
436 UINT32 HexLength;
437 UINT32 DecimalLength;
438 UINT32 Remainder;
439 BOOLEAN SupressZeros = !LeadingZeros;
440 UINT8 HexChar;
441
442
443 ACPI_FUNCTION_ENTRY ();
444
445
446 switch (Base)
447 {
448 case 10:
449
450 /* Setup max length for the decimal number */
451
452 switch (DataWidth)
453 {
454 case 1:
455
456 DecimalLength = ACPI_MAX8_DECIMAL_DIGITS;
457 break;
458
459 case 4:
460
461 DecimalLength = ACPI_MAX32_DECIMAL_DIGITS;
462 break;
463
464 case 8:
465 default:
466
467 DecimalLength = ACPI_MAX64_DECIMAL_DIGITS;
468 break;
469 }
470
471 Remainder = 0;
472
473 for (i = DecimalLength; i > 0; i--)
474 {
475 /* Divide by nth factor of 10 */
476
477 Digit = Integer;
478 for (j = 0; j < i; j++)
479 {
480 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Remainder);
481 }
482
483 /* Handle leading zeros */
484
485 if (Remainder != 0)
486 {
487 SupressZeros = FALSE;
488 }
489
490 if (!SupressZeros)
491 {
492 String[k] = (UINT8) (ACPI_ASCII_ZERO + Remainder);
493 k++;
494 }
495 }
496 break;
497
498 case 16:
499
500 /* HexLength: 2 ascii hex chars per data byte */
501
502 HexLength = (DataWidth * 2);
503 for (i = 0, j = (HexLength-1); i < HexLength; i++, j--)
504 {
505 /* Get one hex digit, most significant digits first */
506
507 HexChar = (UINT8)
508 AcpiUtHexToAsciiChar (Integer, ACPI_MUL_4 (j));
509
510 /* Supress leading zeros until the first non-zero character */
511
512 if (HexChar == ACPI_ASCII_ZERO && SupressZeros)
513 {
514 continue;
515 }
516
517 SupressZeros = FALSE;
518 String[k] = HexChar;
519 k++;
520 }
521 break;
522
523 default:
524 return (0);
525 }
526
527 /*
528 * Since leading zeros are suppressed, we must check for the case where
529 * the integer equals 0
530 *
531 * Finally, null terminate the string and return the length
532 */
533 if (!k)
534 {
535 String [0] = ACPI_ASCII_ZERO;
536 k = 1;
537 }
538
539 String [k] = 0;
540 return ((UINT32) k);
541 }
542
543
544 /*******************************************************************************
545 *
546 * FUNCTION: AcpiExConvertToString
547 *
548 * PARAMETERS: ObjDesc - Object to be converted. Must be an
549 * Integer, Buffer, or String
550 * ResultDesc - Where the string object is returned
551 * Type - String flags (base and conversion type)
552 *
553 * RETURN: Status
554 *
555 * DESCRIPTION: Convert an ACPI Object to a string. Supports both implicit
556 * and explicit conversions and related rules.
557 *
558 ******************************************************************************/
559
560 ACPI_STATUS
AcpiExConvertToString(ACPI_OPERAND_OBJECT * ObjDesc,ACPI_OPERAND_OBJECT ** ResultDesc,UINT32 Type)561 AcpiExConvertToString (
562 ACPI_OPERAND_OBJECT *ObjDesc,
563 ACPI_OPERAND_OBJECT **ResultDesc,
564 UINT32 Type)
565 {
566 ACPI_OPERAND_OBJECT *ReturnDesc;
567 UINT8 *NewBuf;
568 UINT32 i;
569 UINT32 StringLength = 0;
570 UINT16 Base = 16;
571 UINT8 Separator = ',';
572 BOOLEAN LeadingZeros;
573
574
575 ACPI_FUNCTION_TRACE_PTR (ExConvertToString, ObjDesc);
576
577
578 switch (ObjDesc->Common.Type)
579 {
580 case ACPI_TYPE_STRING:
581
582 /* No conversion necessary */
583
584 *ResultDesc = ObjDesc;
585 return_ACPI_STATUS (AE_OK);
586
587 case ACPI_TYPE_INTEGER:
588
589 switch (Type)
590 {
591 case ACPI_EXPLICIT_CONVERT_DECIMAL:
592 /*
593 * From ToDecimalString, integer source.
594 *
595 * Make room for the maximum decimal number size
596 */
597 StringLength = ACPI_MAX_DECIMAL_DIGITS;
598 LeadingZeros = FALSE;
599 Base = 10;
600 break;
601
602 case ACPI_EXPLICIT_CONVERT_HEX:
603 /*
604 * From ToHexString.
605 *
606 * Supress leading zeros and append "0x"
607 */
608 StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth) + 2;
609 LeadingZeros = FALSE;
610 break;
611 default:
612
613 /* Two hex string characters for each integer byte */
614
615 StringLength = ACPI_MUL_2 (AcpiGbl_IntegerByteWidth);
616 LeadingZeros = TRUE;
617 break;
618 }
619
620 /*
621 * Create a new String
622 * Need enough space for one ASCII integer (plus null terminator)
623 */
624 ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
625 if (!ReturnDesc)
626 {
627 return_ACPI_STATUS (AE_NO_MEMORY);
628 }
629
630 NewBuf = ReturnDesc->Buffer.Pointer;
631 if (Type == ACPI_EXPLICIT_CONVERT_HEX)
632 {
633 /* Append "0x" prefix for explicit hex conversion */
634
635 *NewBuf++ = '0';
636 *NewBuf++ = 'x';
637 }
638
639 /* Convert integer to string */
640
641 StringLength = AcpiExConvertToAscii (
642 ObjDesc->Integer.Value, Base, NewBuf, AcpiGbl_IntegerByteWidth, LeadingZeros);
643
644 /* Null terminate at the correct place */
645
646 ReturnDesc->String.Length = StringLength;
647 if (Type == ACPI_EXPLICIT_CONVERT_HEX)
648 {
649 /* Take "0x" prefix into account */
650
651 ReturnDesc->String.Length += 2;
652 }
653
654 NewBuf [StringLength] = 0;
655 break;
656
657 case ACPI_TYPE_BUFFER:
658
659 /* Setup string length, base, and separator */
660
661 switch (Type)
662 {
663 case ACPI_EXPLICIT_CONVERT_DECIMAL: /* Used by ToDecimalString */
664 /*
665 * Explicit conversion from the ToDecimalString ASL operator.
666 *
667 * From ACPI: "If the input is a buffer, it is converted to a
668 * a string of decimal values separated by commas."
669 */
670 LeadingZeros = FALSE;
671 Base = 10;
672
673 /*
674 * Calculate the final string length. Individual string values
675 * are variable length (include separator for each)
676 */
677 for (i = 0; i < ObjDesc->Buffer.Length; i++)
678 {
679 if (ObjDesc->Buffer.Pointer[i] >= 100)
680 {
681 StringLength += 4;
682 }
683 else if (ObjDesc->Buffer.Pointer[i] >= 10)
684 {
685 StringLength += 3;
686 }
687 else
688 {
689 StringLength += 2;
690 }
691 }
692 break;
693
694 case ACPI_IMPLICIT_CONVERT_HEX:
695 /*
696 * Implicit buffer-to-string conversion
697 *
698 * From the ACPI spec:
699 * "The entire contents of the buffer are converted to a string of
700 * two-character hexadecimal numbers, each separated by a space."
701 *
702 * Each hex number is prefixed with 0x (11/2018)
703 */
704 LeadingZeros = TRUE;
705 Separator = ' ';
706 StringLength = (ObjDesc->Buffer.Length * 5);
707 break;
708
709 case ACPI_EXPLICIT_CONVERT_HEX:
710 /*
711 * Explicit conversion from the ToHexString ASL operator.
712 *
713 * From ACPI: "If Data is a buffer, it is converted to a string of
714 * hexadecimal values separated by commas."
715 *
716 * Each hex number is prefixed with 0x (11/2018)
717 */
718 LeadingZeros = TRUE;
719 Separator = ',';
720 StringLength = (ObjDesc->Buffer.Length * 5);
721 break;
722
723 default:
724 return_ACPI_STATUS (AE_BAD_PARAMETER);
725 }
726
727 /*
728 * Create a new string object and string buffer
729 * (-1 because of extra separator included in StringLength from above)
730 * Allow creation of zero-length strings from zero-length buffers.
731 */
732 if (StringLength)
733 {
734 StringLength--;
735 }
736
737 ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) StringLength);
738 if (!ReturnDesc)
739 {
740 return_ACPI_STATUS (AE_NO_MEMORY);
741 }
742
743 NewBuf = ReturnDesc->Buffer.Pointer;
744
745 /*
746 * Convert buffer bytes to hex or decimal values
747 * (separated by commas or spaces)
748 */
749 for (i = 0; i < ObjDesc->Buffer.Length; i++)
750 {
751 if (Base == 16)
752 {
753 /* Emit 0x prefix for explicit/implicit hex conversion */
754
755 *NewBuf++ = '0';
756 *NewBuf++ = 'x';
757 }
758
759 NewBuf += AcpiExConvertToAscii (
760 (UINT64) ObjDesc->Buffer.Pointer[i], Base, NewBuf, 1, LeadingZeros);
761
762 /* Each digit is separated by either a comma or space */
763
764 *NewBuf++ = Separator;
765 }
766
767 /*
768 * Null terminate the string
769 * (overwrites final comma/space from above)
770 */
771 if (ObjDesc->Buffer.Length)
772 {
773 NewBuf--;
774 }
775 *NewBuf = 0;
776 break;
777
778 default:
779
780 return_ACPI_STATUS (AE_TYPE);
781 }
782
783 *ResultDesc = ReturnDesc;
784 return_ACPI_STATUS (AE_OK);
785 }
786
787
788 /*******************************************************************************
789 *
790 * FUNCTION: AcpiExConvertToTargetType
791 *
792 * PARAMETERS: DestinationType - Current type of the destination
793 * SourceDesc - Source object to be converted.
794 * ResultDesc - Where the converted object is returned
795 * WalkState - Current method state
796 *
797 * RETURN: Status
798 *
799 * DESCRIPTION: Implements "implicit conversion" rules for storing an object.
800 *
801 ******************************************************************************/
802
803 ACPI_STATUS
AcpiExConvertToTargetType(ACPI_OBJECT_TYPE DestinationType,ACPI_OPERAND_OBJECT * SourceDesc,ACPI_OPERAND_OBJECT ** ResultDesc,ACPI_WALK_STATE * WalkState)804 AcpiExConvertToTargetType (
805 ACPI_OBJECT_TYPE DestinationType,
806 ACPI_OPERAND_OBJECT *SourceDesc,
807 ACPI_OPERAND_OBJECT **ResultDesc,
808 ACPI_WALK_STATE *WalkState)
809 {
810 ACPI_STATUS Status = AE_OK;
811
812
813 ACPI_FUNCTION_TRACE (ExConvertToTargetType);
814
815
816 /* Default behavior */
817
818 *ResultDesc = SourceDesc;
819
820 /*
821 * If required by the target,
822 * perform implicit conversion on the source before we store it.
823 */
824 switch (GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs))
825 {
826 case ARGI_SIMPLE_TARGET:
827 case ARGI_FIXED_TARGET:
828 case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */
829
830 switch (DestinationType)
831 {
832 case ACPI_TYPE_LOCAL_REGION_FIELD:
833 /*
834 * Named field can always handle conversions
835 */
836 break;
837
838 default:
839
840 /* No conversion allowed for these types */
841
842 if (DestinationType != SourceDesc->Common.Type)
843 {
844 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
845 "Explicit operator, will store (%s) over existing type (%s)\n",
846 AcpiUtGetObjectTypeName (SourceDesc),
847 AcpiUtGetTypeName (DestinationType)));
848 Status = AE_TYPE;
849 }
850 }
851 break;
852
853 case ARGI_TARGETREF:
854 case ARGI_STORE_TARGET:
855
856 switch (DestinationType)
857 {
858 case ACPI_TYPE_INTEGER:
859 case ACPI_TYPE_BUFFER_FIELD:
860 case ACPI_TYPE_LOCAL_BANK_FIELD:
861 case ACPI_TYPE_LOCAL_INDEX_FIELD:
862 /*
863 * These types require an Integer operand. We can convert
864 * a Buffer or a String to an Integer if necessary.
865 */
866 Status = AcpiExConvertToInteger (SourceDesc, ResultDesc,
867 ACPI_IMPLICIT_CONVERSION);
868 break;
869
870 case ACPI_TYPE_STRING:
871 /*
872 * The operand must be a String. We can convert an
873 * Integer or Buffer if necessary
874 */
875 Status = AcpiExConvertToString (SourceDesc, ResultDesc,
876 ACPI_IMPLICIT_CONVERT_HEX);
877 break;
878
879 case ACPI_TYPE_BUFFER:
880 /*
881 * The operand must be a Buffer. We can convert an
882 * Integer or String if necessary
883 */
884 Status = AcpiExConvertToBuffer (SourceDesc, ResultDesc);
885 break;
886
887 default:
888
889 ACPI_ERROR ((AE_INFO,
890 "Bad destination type during conversion: 0x%X",
891 DestinationType));
892 Status = AE_AML_INTERNAL;
893 break;
894 }
895 break;
896
897 case ARGI_REFERENCE:
898 /*
899 * CreateXxxxField cases - we are storing the field object into the name
900 */
901 break;
902
903 default:
904
905 ACPI_ERROR ((AE_INFO,
906 "Unknown Target type ID 0x%X AmlOpcode 0x%X DestType %s",
907 GET_CURRENT_ARG_TYPE (WalkState->OpInfo->RuntimeArgs),
908 WalkState->Opcode, AcpiUtGetTypeName (DestinationType)));
909 Status = AE_AML_INTERNAL;
910 }
911
912 /*
913 * Source-to-Target conversion semantics:
914 *
915 * If conversion to the target type cannot be performed, then simply
916 * overwrite the target with the new object and type.
917 */
918 if (Status == AE_TYPE)
919 {
920 Status = AE_OK;
921 }
922
923 return_ACPI_STATUS (Status);
924 }
925